Hi
On 2010-09-02 16:20, ADRIE KINTZIGER wrote:
Gravity is everywhere around us and different on all locations.
How? well, mass is involved , so it depends on the observers weight-distance
to the earthcore( max mass) and distance to the earthrotationsaxle.spacetime
is involved because gravity , like light , is bendible, compressible,
etc...(all proven).
Some minor players are involved , like lake's different mass than
soil,mountains, sea, etc,
The location.
The local location, the direct vicinity of the gravity field around a human
observer, gravity is different in your backyard if you compare it to your
livingroom, (masses), gravity is different in an airoplane then on the
ground, different distance to earthcore-airoplane-than airoplane -observer
on the ground. gravity, time is different in a satellite than it is on the
ground, space/timedilatation,(relativity of speeds, bending of time).
So to show an example , mostly in a sattellite in a geo-stationair position
time goes about 4 full minute's slower than it goes on earth
they have to correct this every day for all sattelite's depending on the
orbits/speeds, different bending.
I'm actually not sure the best way to explain gravity's effect is that
mass curves space.
Think of it this way, the effect of gravity reaches far out in space
from a massive object. The effect causes other objects to fall towards
the massive object. However, the strange thing is that the object always
accelerates towards the massive object at the same acceleration,
regardless of *its* mass. This means that the massive object must draw a
larger object harder towards itself, because it requires more force to
accelerate a larger object than a smaller.
But this doesn't make any sense. How could the sun direct more gravitons
(or whatever it is) towards Jupiter than it sends towards Earth. No
sense at all.
So, in light of this, Einstein's solution was that space itself was
curved, causing the differently sized objects Jupiter and Earth fall
towards sun at the same acceleration. He sort of fooled the system.
However, even if such a solution has a certain appeal, apart from the
fact that it works very well, it kind of bites itself in the tail. It
tries to explain the gravity that pull planets towards the sun using the
gravity that makes a ball roll down a slope. But since we know that the
two "kinds" of gravities are really the same, the proof becomes circular.
If we now back up to the original problem, we can see that another
solution is the one John and I mentioned the other day, but I'm pretty
sure most of you either didn't take notice, or just thought we were
fooling around. The other solution is that space itself is the origin of
gravity, and it *pushes* all mass away from it. The net effect will
always be the same, Earth will get pushed from all directions *but* from
the sun, or rather, the sun will cancel out just as much gravity as
required to accelerate the Earth towards the sun in exactly the same way
the curved space explanation would stipulate.
All the proofs that proves that space gets curved are *probably* proven
within that system. The system where space *is* curved, so I'm not so
sure it's possible to prove much else given that first assumption.
Magnus
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